带交互功能的HTML5+JS跳动的爱心

简介: 带交互功能的HTML5+JS跳动的爱心


<!DOCTYPE html>
<html lang="zh">
  <head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>跳动的爱心</title>
    <style>
      * {
        padding: 0;
        margin: 0;
      }
      body {
        height: 600px;
        padding: 0;
        margin: 0;
        background: #000;
        display: flex;
        justify-content: center;
        align-items: center;
      }
      .container {
        width: 500px;
        height: 500px;
        position: relative;
      }
      canvas {
        z-index: 99;
        position: absolute;
        width: 500px;
        height: 500px;
      }
      .text_box {
        text-align: center;
        position: absolute;
        font-size: 1.125rem;
        top: 36%;
        left: 22%;
        color: #ff437b;
        z-index: 100;
      }
      input {
        font-size: 1.375rem;
        color: #ff437b;
        text-align: center;
        background: none;
      }
      button {
        font-size: 1.375rem;
        border: none;
        border-radius: 4px;
      }
      input::input-placeholder {
        color: #dc4b61;
      }
      input::-webkit-input-placeholder {
        color: #dc4b61;
      }
      .heart {
        animation: heart 1s infinite ease-in-out;
      }
      @keyframes heart {
        0%,
        100% {
          transform: rotate(-2deg) scale(1);
        }
        50% {
          transform: rotate(2deg) scale(1.12);
        }
      }
    </style>
  </head>
  <body>
    <div id="jsi-cherry-container" class="container ">
      <!-- 爱心 -->
      <canvas id="pinkboard" class="container heart"> </canvas>
      <!-- 输入你需要的文字 -->
      <div class="text_box">
        <input type="text" id="text" placeholder="送给你的那个[Ta]️">
        <button id="btn" onclick="fn()">❤️</button>
      </div>
    </div>
  </body>
  <script src="https://apps.bdimg.com/libs/jquery/2.1.4/jquery.min.js"></script>
  <script>
    function fn() {
      var a1 = document.querySelector('#text');
      var btn = document.querySelector('#btn');
      a1.style.border = 'none';
      btn.parentNode.removeChild(btn);
      console.log("点关注不迷路!");
    }
  </script>
  <script>
    /*
     * Settings
     */
    var settings = {
      particles: {
        length: 500, // maximum amount of particles
        duration: 2, // particle duration in sec
        velocity: 100, // particle velocity in pixels/sec
        effect: -0.75, // play with this for a nice effect
        size: 30, // particle size in pixels
      },
    };
    (function() {
      var b = 0;
      var c = ["ms", "moz", "webkit", "o"];
      for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) {
        window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"];
        window.cancelAnimationFrame =
          window[c[a] + "CancelAnimationFrame"] ||
          window[c[a] + "CancelRequestAnimationFrame"];
      }
      if (!window.requestAnimationFrame) {
        window.requestAnimationFrame = function(h, e) {
          var d = new Date().getTime();
          var f = Math.max(0, 16 - (d - b));
          var g = window.setTimeout(function() {
            h(d + f);
          }, f);
          b = d + f;
          return g;
        };
      }
      if (!window.cancelAnimationFrame) {
        window.cancelAnimationFrame = function(d) {
          clearTimeout(d);
        };
      }
    })();
    /*
     * Point class
     */
    var Point = (function() {
      function Point(x, y) {
        this.x = typeof x !== "undefined" ? x : 0;
        this.y = typeof y !== "undefined" ? y : 0;
      }
      Point.prototype.clone = function() {
        return new Point(this.x, this.y);
      };
      Point.prototype.length = function(length) {
        if (typeof length == "undefined")
          return Math.sqrt(this.x * this.x + this.y * this.y);
        this.normalize();
        this.x *= length;
        this.y *= length;
        return this;
      };
      Point.prototype.normalize = function() {
        var length = this.length();
        this.x /= length;
        this.y /= length;
        return this;
      };
      return Point;
    })();
    /*
     * Particle class
     */
    var Particle = (function() {
      function Particle() {
        this.position = new Point();
        this.velocity = new Point();
        this.acceleration = new Point();
        this.age = 0;
      }
      Particle.prototype.initialize = function(x, y, dx, dy) {
        this.position.x = x;
        this.position.y = y;
        this.velocity.x = dx;
        this.velocity.y = dy;
        this.acceleration.x = dx * settings.particles.effect;
        this.acceleration.y = dy * settings.particles.effect;
        this.age = 0;
      };
      Particle.prototype.update = function(deltaTime) {
        this.position.x += this.velocity.x * deltaTime;
        this.position.y += this.velocity.y * deltaTime;
        this.velocity.x += this.acceleration.x * deltaTime;
        this.velocity.y += this.acceleration.y * deltaTime;
        this.age += deltaTime;
      };
      Particle.prototype.draw = function(context, image) {
        function ease(t) {
          return --t * t * t + 1;
        }
        var size = image.width * ease(this.age / settings.particles.duration);
        context.globalAlpha = 1 - this.age / settings.particles.duration;
        context.drawImage(
          image,
          this.position.x - size / 2,
          this.position.y - size / 2,
          size,
          size
        );
      };
      return Particle;
    })();
    /*
     * ParticlePool class
     */
    var ParticlePool = (function() {
      var particles,
        firstActive = 0,
        firstFree = 0,
        duration = settings.particles.duration;
      function ParticlePool(length) {
        // create and populate particle pool
        particles = new Array(length);
        for (var i = 0; i < particles.length; i++)
          particles[i] = new Particle();
      }
      ParticlePool.prototype.add = function(x, y, dx, dy) {
        particles[firstFree].initialize(x, y, dx, dy);
        // handle circular queue
        firstFree++;
        if (firstFree == particles.length) firstFree = 0;
        if (firstActive == firstFree) firstActive++;
        if (firstActive == particles.length) firstActive = 0;
      };
      ParticlePool.prototype.update = function(deltaTime) {
        var i;
        // update active particles
        if (firstActive < firstFree) {
          for (i = firstActive; i < firstFree; i++)
            particles[i].update(deltaTime);
        }
        if (firstFree < firstActive) {
          for (i = firstActive; i < particles.length; i++)
            particles[i].update(deltaTime);
          for (i = 0; i < firstFree; i++) particles[i].update(deltaTime);
        }
        // remove inactive particles
        while (
          particles[firstActive].age >= duration &&
          firstActive != firstFree
        ) {
          firstActive++;
          if (firstActive == particles.length) firstActive = 0;
        }
      };
      ParticlePool.prototype.draw = function(context, image) {
        // draw active particles
        if (firstActive < firstFree) {
          for (i = firstActive; i < firstFree; i++)
            particles[i].draw(context, image);
        }
        if (firstFree < firstActive) {
          for (i = firstActive; i < particles.length; i++)
            particles[i].draw(context, image);
          for (i = 0; i < firstFree; i++) particles[i].draw(context, image);
        }
      };
      return ParticlePool;
    })();
    /*
     * Putting it all together
     */
    (function(canvas) {
      var context = canvas.getContext("2d"),
        particles = new ParticlePool(settings.particles.length),
        particleRate =
        settings.particles.length / settings.particles.duration, // particles/sec
        time;
      // get point on heart with -PI <= t <= PI
      function pointOnHeart(t) {
        return new Point(
          160 * Math.pow(Math.sin(t), 3),
          130 * Math.cos(t) -
          50 * Math.cos(2 * t) -
          20 * Math.cos(3 * t) -
          10 * Math.cos(4 * t) +
          25
        );
      }
      // creating the particle image using a dummy canvas
      var image = (function() {
        var canvas = document.createElement("canvas"),
          context = canvas.getContext("2d");
        canvas.width = settings.particles.size;
        canvas.height = settings.particles.size;
        // helper function to create the path
        function to(t) {
          var point = pointOnHeart(t);
          point.x =
            settings.particles.size / 2 +
            (point.x * settings.particles.size) / 350;
          point.y =
            settings.particles.size / 2 -
            (point.y * settings.particles.size) / 350;
          return point;
        }
        // create the path
        context.beginPath();
        var t = -Math.PI;
        var point = to(t);
        context.moveTo(point.x, point.y);
        while (t < Math.PI) {
          t += 0.01; // baby steps!
          point = to(t);
          context.lineTo(point.x, point.y);
        }
        context.closePath();
        // create the fill
        context.fillStyle = "#dc4b61";
        context.fill();
        // create the image
        var image = new Image();
        image.src = canvas.toDataURL();
        return image;
      })();
      // render that thing!
      function render() {
        // next animation frame
        requestAnimationFrame(render);
        // update time
        var newTime = new Date().getTime() / 1000,
          deltaTime = newTime - (time || newTime);
        time = newTime;
        // clear canvas
        context.clearRect(0, 0, canvas.width, canvas.height);
        // create new particles
        var amount = particleRate * deltaTime;
        for (var i = 0; i < amount; i++) {
          var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
          var dir = pos.clone().length(settings.particles.velocity);
          particles.add(
            canvas.width / 2 + pos.x,
            canvas.height / 2 - pos.y,
            dir.x,
            -dir.y
          );
        }
        // update and draw particles
        particles.update(deltaTime);
        particles.draw(context, image);
      }
      // handle (re-)sizing of the canvas
      function onResize() {
        canvas.width = canvas.clientWidth;
        canvas.height = canvas.clientHeight;
      }
      window.onresize = onResize;
      // delay rendering bootstrap
      setTimeout(function() {
        onResize();
        render();
      }, 10);
    })(document.getElementById("pinkboard"));
  </script>
</html>


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